本题目来源于试卷: Physics Unit16: Electric Charge and Electric Field，类别为 国际高中通用物理
[单选题]
A positive point charg ze61gf4a+8jp*whjhqyepb(2dd;a h2 eat utl 71(wfkoj2 en9, is enclosed in a hollow metallic sphere that is grounded. As compared to the case without7a2 jo9 1(,kflttwne u the hollow sphere, the electric field at a point directly above the hollow sphere has
A. diminished to zero.
B. diminished somewhat.
C. increased somewhat.
D. not changed.
参考答案: A
本题详细解析:
暂无
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